General Tools - Free Online Calculation Tools

Solve algebraic equations instantly with detailed steps. Supports linear equations, quadratic formulas, and systems of equations.

Professional tool for calculating image aspect ratios and dimensions.

Measure distances between points, calculate polygon areas, and convert units instantly. Supports kilometers, miles, acres, and hectares.

Professional P value calculator supporting multiple statistical distributions. Get accurate results with visual charts and clear interpretations for hypothesis testing.

Calculate your course grades, convert between percentage and letter grades, estimate GPA with weighted assignments.

Professional BTU calculator for HVAC sizing. Convert between BTU/hr, kW, and tons. Perfect for selecting air conditioners with precise capacity calculations.

Calculate the true annual percentage yield (APY) by accounting for compound interest effects.

Calculate all properties of right triangles: sides a,b,c, angles α,β, area, perimeter, height. Includes step-by-step solutions, visual diagrams, supports degrees and radians.

Calculate how inflation affects your money over time.

Calculate your IRA contribution limits, check Roth IRA eligibility based on income, and project retirement savings growth with our comprehensive tool.

Calculate your maximum Roth IRA contribution for 2026.

Professional molarity calculator for chemistry students and researchers.

Advanced online scientific calculator featuring trigonometry, logarithms, factorials, angle mode conversion, and interactive Chart.

Calculate days between dates, determine exact age, and perform date arithmetic instantly. No data stored - all calculations happen in your browser for complete privacy and security.

Professional cubic yard calculator for accurate material estimation. Calculate volume for concrete, mulch, gravel, and soil.

Calculate tolls and fuel costs for your road trip instantly. Compare different routes, estimate total expenses, and plan your travel budget.

Comprehensive home buying calculator that computes down payment amounts, monthly mortgage payments, total interest costs and provides amortization schedules for informed home...

Free online 1RM calculator supporting Epley, Brzycki, Lombardi and more formulas. Track strength progress with interactive charts and personalized training recommendations.

Scientifically calculate daily calories, protein, carbs and fat for healthy weight gain. Based on TDEE with customizable surplus levels.

Calculate PayPal fees instantly for all transaction types. Support multi-currency, tiered rates, and detailed fee breakdown.

Calculate your ideal calorie intake for fat loss based on scientific formulas.

Calculate inverse functions instantly with detailed step-by-step explanations. Supports linear, quadratic, exponential, logarithmic, and trigonometric functions.

Professional capital gains calculator with 2026 tax rates.

Calculate your actual take-home pay with our comprehensive income calculator. Enter gross salary to see detailed tax breakdown, social security deductions, and net income.